//#include<iostream>
//#include<string>
//using namespace std;
//
//class Person 
//{
//public:
//	Person()
//	{
//		cout << "name is " << _name << endl;
//		cout << "age is " << _age << endl;
//	}
//protected:
//	int _age = 18;
//	string _name = "petter";
//};
//
//class Studen :public Person 
//{
//	Studen();
//protected:
//	int _stuid;
//};
//
//class Teacher :public Person
//{
//
//protected:
//	int _workid;
//};


int main()
{
	//Person p1;
	//Studen s1;
	return 0;
}